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ANAT 315 Term 1 > Lecture 9 > Flashcards

Lecture 9 Flashcards

1
Q

interosseus membrane

A

fibrous connective tissue membrane between the shafts of the radius and ulna

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2
Q

Compartments of forearm

A

anterior:
superficial, ontermediate, deep
posterior:
superficial, deep

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3
Q

Pronator teres: origin

A

medial epicondyle of humerus

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4
Q

Pronator teres: insertion

A

lateral radius

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5
Q

Pronator teres: action

A

pronation

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6
Q

Flexor carpi radialis: origin

A

medial epicondyle of humerus

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7
Q

Flexor carpi radialis: insertion

A

2nd and 3rd metacarpals

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8
Q

Flexor carpi radialis: actions (2)

A

flexion of wrist, abduction of wrist

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9
Q

palmaris longus (the one some people don’t have anymore): origin

A

medial epicondyle of humerus

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10
Q

palmaris longus: insertion

A

palmar aponeurosis

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11
Q

palmaris longus: action

A

weak flexion of wrist

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12
Q

what is the palmar aponeurosis

A

thickening of palmar fascia (connective tissue) - cotinous with the tendon of palmaris longus

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13
Q

Flexor carpi ulnaris: origin

A

medial epicondyle of humerus; olecranon of ulna

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14
Q

Flexor carpi ulnaris: insertions (3)

A

carpals (pisiform, hook of hamate), 5th metacarpal

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15
Q

Flexor carpi ulnaris: actions (2)

A

flexion of wrist, adduction of wrist

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16
Q

what is the trick to remember anterior compartment - superficial muscles?

A

Pass - Fail - Pass - Fail
pronator teres - flexor carpi radialis - palmaris longus - flexor carpi ulnaris

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17
Q

Flexor digitorum superficialis: origin (2)

A

medial epicondyle of humerus, anterior surface of radius and ulna

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18
Q

Flexor digitorum superficialis: insertion

A

4 tendons split and insert on middle phalanges 2-5

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19
Q

Flexor digitorum superficialis: actions (3)

A

flexion of wrist, flexion of metacarpophalangeal joint 2-5, flexion of proximal interphalangeal joints 2-5

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20
Q

Flexor digitorum profundus: origin

A

ulna, interosseus membrane

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21
Q

Flexor digitorum profundus: insertion

A

distal phalanges 2-5

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22
Q

Flexor digitorum profundus: actions

A

same as flexor digitorum superficialis plus flexion of distal interphalangeal joints 2-5

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23
Q

Trick to remember flexor digitorum superficialis and flexor digitorum profundus

A

flexor digitorum superficialis splits in two to allow flexor digitorum profundus to pass through

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24
Q

Flexor pollicis longus: origins (2)

A

anterior radius interosseus membrane

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25
Q

Flexor pollicis longus: insertion

A

distal phalanx of the thumb

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26
Q

Flexor pollicis longus: action

A

flexion of the thumb

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27
Q

pronator quadratus: origin

A

distal anterior surf ace of ulna

28
Q

pronator quadratus: insertion

A

distal anterior surfa e of radius

29
Q

pronator quadratus: action

A

pronation

30
Q

What muscles are innervated by the median nerve

A

all anterior forearm muscles (pronator teres, flexor carpi radialis, palmaris, flexor digitorum superficialis, pronator quadratus, flexor policis longus) except flexor carpi ulnaris and median half of flexor digitorum profundus

31
Q

What muscles are innervated by the ulnar nerve

A

flexor carpi unlnaris, median half of digitorum profundus

32
Q

What is the flexor retinaculum?

A

fibrous connective tissue band located on the palmar surface of the hand, near the wrist - holds the tendon of the flexor muscles in place - forms the roof of the carpal tunnel

33
Q

What is carpal tunnel?

A

flexor retinaculum arches over the carpal bones of the wrist to form the carpal tunnel (across palm of hand)

34
Q

What does the carpal tunnel contain?

A

tendons of: flexor digitorum superficialis & profundus, flexor pollicis longus
median nerve

35
Q

Extensor carpi radials longus and brevis: origin

A

lateral epicondyle of humerus

36
Q

Extensor carpi radials longus and brevis: insertion

A

2nd and 3rd metacarpals

37
Q

Extensor carpi radials longus and brevis: actions

A

extension of wrist, abduction of wrist

38
Q

extensor capri ulnaris: origin

A

lateral epicondyle of humerus

39
Q

extensor capri ulnaris: insertion

A

base of the 5th metacarpal

40
Q

extensor capri ulnaris: actions (2)

A

extension of wrist, adduction of wrist

41
Q

Extensor digitorum: origin

A

lateral epicondyle of humerus

42
Q

Extensor digitorum: insertion

A

posterior surfaces of phalanges 2-5

43
Q

Extensor digitorum: actions (2)

A

extension of wrist, extension of fingers

44
Q

Extension digiti minimi: origin

A

lateral epicondyle of humerus

45
Q

Extension digiti minimi: insertions (2)

A

middle phalanx of pinky finger (5th digit), posterior surface

46
Q

Extension digiti minimi: actions (2)

A

extension of wrist, extension of pinky finger

47
Q

Supinator: origins (2)

A

lateral epicondyle of humerus, proximal ulna

48
Q

Supinator: insertion

A

lateral proximal radius

49
Q

Supinator: action

A

supination

50
Q

abductor pollicis longus: origins (2)

A

proximal ulna & radius, posterior surface

51
Q

abductor pollicis longus: insertion

A

1st metacarpal

52
Q

abductor pollicis longus: action

A

abduction of thumb and wrist

53
Q

extensor pollicis longus: origins (2)

A

posterior ulan, interosseus membrane

54
Q

extensor pollicis longus: insertions (2)

A

thumb, distal phalanx

55
Q

extensor pollicis longus: action

A

extension of thumb

56
Q

extensor pollicis brevis: origins (2)

A

posterior radius, interosseus membrane

57
Q

extensor pollicis brevis: insertions (2)

A

thumb, proximal phalanx

58
Q

extensor pollicis brevis: action

A

extension of the thumb

59
Q

extensor indicis (index finger): origins (2)

A

posterior distal ulna and interosseus memebrane

60
Q

extensor indicis (index finger): insetrion

A

index finger

61
Q

extensor indicis (index finger): actions (2)

A

extension of index finger, extension of wrist

62
Q

anatomical snuffbox: lateral border

A

abductor pollicis longus tendon, extensor polliccis brevis tendon

63
Q

anatomical snuffbox: medial border

A

extensor pollicis longus tendon

64
Q

what nerve innervates all posterior forearm muscles?

A

radial nerve

65
Q

what is the extensor retinaculum?

A

fibrous connective tissue band located on the dorsal surface of the hand, near the wrist, holds the tendons of the extensor muscles in place

66
Q

what are extrinsic muscles?

A

muscles of the hand, originate in the forarm and insert on the hand, control crude movements

67
Q

what are intrinsic muscles?

A

originate and insert within the hand, control fine movements of the hand

ANAT 315 Term 1 (9 decks)

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